Mileage = 100,000
Engine size 3.8 6 cyl.
Heater works normal for 15 minutes then blows cold air on one side and hot air on other.

A common cause for this is a failed "temperature door actuator motor".There is one for each side of
the dash- driver side, passenger side. These motors control the temperature coming out of the vents.

Have had a few of the heater - a/c control units go bad, but not many. Is almost always the actuator
motor.


Question: 2003 Buick Lesabre limited 3800 series.
Passenger side blows cold air - drivers side does not.  Both blow hot but passenger is hotter.
Passenger door temperature adjustment button does not work.  Actuators are moving fine.

Answer: Usually, it's an actuator that is the cause of this problem, but I'll assume they are ok since
you say they are moving fine. The next most likely cause would be the control head, but that would
be an expensive guess.

You could have a door problem inside the heater case, and you would still see the actuator move
normally. Depends which route you want to go, but I'd be sure and check the actuators again and
possibly remove them to see if the internal doors are broken before trying the control head.


Problem with my 1988 Buick Electra Park Avenue. My check engine light is on
I dont know that the codes are.

There was no repair that i know of that caused the condition, it was my grand fathers and he only
drove it 5 miles to work a day. Iput a new
egr valve, removed the catalytic converter, and put a
new muffler on the car.

My problem is that my exhaust manifolds are becoming red hot, i thought the catalytic converter
and muffler were plugged, and then replaced the egr valve. After this i took it for a ride and they
were still glowing so i am out of ideas.

Answer: The reason the exhaust is glowing red hot, is that there is unburned fuel in the exhaust.
This is caused by a very rich condition. You may have a leaking fuel pressure regulator, or a
stuck open injector.

You can try to tap on the injectors to see if you can free one up. It would cause that cylinder to
misfire badly. If it were the pressure regulator, the vacuum line would be full of gas and cause
several cylinders to misfire.


97 BUICK PARK AVENUE.
I WAS WONDERING DO A 2000 BUICK LESABRE FRONT LOWER CONTROL ARM FITS A 97
PARK AVE CAUSE THEY MAKE DIFFERENT CONTROL ARMS FOR THE LESABRE AND PARK
AVE AND THE CONTROL ARM THAT I HAD SEEN OFF A BUICK LESABRE 2000 ITS THE SAME
EXACT FIT OF MY CAR. AC DELCO MADE THE PART FOR THE BUICK LESABRE THAT FIT MY
97 PARK AVE.

Answer: Those two cars are different. The only way to be sure what will fit is to have the dealer
cross the numbers. That will tell you for sure. There is no way we can just say yes or no. Some
research is needed and the dealer will do that for you at no cost.

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1998 Buick Park Avenue Vents Not Blowing Hot